Palumbina grandiunca Lee et Li

Ga-Eun Lee 1, Houhun Li, Taeman Han & Haechul Park, 2018, A taxonomic review of the genus Palumbina Rondani, 1876 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of twelve new species, Zootaxa 4414 (1), pp. 1-73 : 15-16

Palumbina grandiunca Lee et Li , sp. nov.

( Figs 1 , 49 , 53 , 68 , 91 , 111 )

Type material. Holotype ♂, CHINA, Hainan Province, Tianchi (18.73°N, 108.87°E), 787 m, Jianfengling , 15.i.2016, leg. Kaijian Teng, Xia Bai and Mengting Chen, genitalia slide no. LGE16043, DNA voucher no. LGE- G008 . Paratypes. Hainan Province: 1 ♀, same data as holotype, genitalia slide no. LGE16044, DNA voucher no. LGE-G009 ; 2 ♀♀, Tianchi (18.74°N, 108.84°E), 1050 m, Jianfengling , Ledong County, 30.iv.2013, leg. Yinghui Sun, Wei Guan and Tengteng Liu, genitalia slide nos. LGE16038, LGE16330, DNA voucher no. LGE-G039 ; 1 ♀, Jianfengling Nature Reserves (18.74°N, 108.87°E), 770 m, Ledong County, 17.vii.2014, leg. Peixin Cong, Linjie Liu and Sha Hu ; 1 ♀, Wuzhishan Nature Reserves (18.90°N, 109.67°E), 738 m, 29.x.2016, leg. Xia Bai, Shuonan Qian and Wanding Qi ; Guangdong Province: 1 ♂, Mt. He (22.78°N, 112.97°E), 18.xii.2002, leg. Guilin Liu et al., genitalia slide no. ZJL05415 ; 4 ♂♂, 1 ♀, Shenmishaqiu, 8 m, Hebao Is. (21.87°N, 113.18°E), Zhuhai City , 19.i.20 10, leg. Houhun Li et al., genitalia slide nos. LGE16317, LGE16318 ; Guangxi Zhuang Autonomous Region: 1 ♀, Pinglongshan, 510 m, Shangsi County (22.16°N, 107.99°E), 6.iv.2002, leg. Shulian Hao and Huaijun Xue, genitalia slide no. LGE16329; Hong Kong: 1 ♂, Kadoorie Farm H.K.U. Sek Kong , N.T., 1.ix.1994, leg. R.C. Kendrick, genitalia slide no. ZH06407 ; 1 ♂, Kadoorie Agricultural Research Centre, 200 m, Shek Kong , N.T., 24.ii.1997, leg. R.C. Kendrick ; 2 ♂♂, Kadoorie Agricultural Research Centre (22.44°N, 114.13°E), 210 m, 12̄ 13.iv.2007, leg. Houhun Li et al., genitalia slide no. LGE16325 ; 1 ♂, Kadoorie Agricultural Research Centre (22.44°N, 114.13°E), 210 m, 17.ix.2009, leg. Houhun Li et al .; 1 ♀, Huanglongkeng, 130 m, Dayushan , 18.ix.2009, leg. Houhun Li et al .

Description. Adult (Fig. 68). Wingspan 9.5̄12.0 mm. Head silvery white to creamy white. Labial palpus silvery white except segment I tinted with fuscous on outer surface, segment II and III shorter and thickened in male: segment II with hair pencil reaching subapex of III, segment III as long as II, dorso-distal half fuscous, slightly appressed; in female, segment II fuscous dorso-distally, segment III brown to fuscous. Antenna with scape white to creamy, sometimes fuscous distally on posterior margin; flagellum black except dorsal 1/2 white, male with cilia as long as width. Thorax and tegula white, posteriorly grey. Forewing ground color grey to fuscous, with ochreous reflections, often suffused with greyish white scales before apex; markings greyish white: antemedian fascia straight, slender, often interrupted by fuscous scales at fold; distal streak at anterior 1/4, 1/2 and 3/4, respectively, running in parallel: first and second distal streaks lying from 1/2 or 3/5 to 3/4; third distal streak thicker and approximately 1/3 to 1/2 length of first and second, sometimes merged with second. Hindwing grey to fuscous. Legs creamy white to ochre; fore femur, tibia and tarsus black on outer surface; mid tarsus black on inner surface; hind femur black at base, hind tibia suffused with fuscous near tibial spurs, at middle and at apex on outer surface, mostly blacke on inner surface, hind tarsus black at apex of each tarsomere on outer surface, mostly black on inner surface.

Pregenital abdomen ( Figs 49 , 53). In male, coremata placed interiorly, about 1/3 length of abdomen; sternum VIII sub-trapezoidal, posteriorly emarginate at middle; tergum VIII with a linear sclerite at middle on posterior margin.

Male genitalia (Fig. 91). Uncus very large, 1/2 length and 2/3 width of tegumen, rounded laterally, with dense hairs on ventral surface; apex broadly concave, with a medial tooth. Culcitula absent. Gnathos hook thick, gradually widening from base to distal 1/3, then tapering toward apex. Tegumen with anterior margin broadly concave. Valva uniformly elongate, nearly straight, distal 1/4 with dense hairs, inwardly pointed at apex. Sacculus slender, clubbed, 1/2 length of valva, constricted basally, with sparse hairs distally, blunt apically. Anellus lobe digitate, 1/2 length of valva, distal half slightly narrowed; apical bristle as long as anellus lobe, exceeding apex of valva. Vinculum sub-trapezoidal. Saccus slender, 1/2 length of anellus lobe. Juxta simple, with sparse hairs at middle of inner margin. Aedeagus with basal 2/5 dilated, distal 3/5 slightly curved; medially constricted in ventral view, gradually widening toward apex, nearly straight apically; slender sclerite arising from middle, exceeding apex of aedeagus.

Female genitalia (Fig. 111). Papillae anales simple. Apophyses anteriores about 1/4 length of apophyses posteriores. Tergum VIII twice as long as sternum VIII, posterior half constricted, with deep median incision reaching middle, anterior margin broadly concave; sternum VIII with median incision posteriorly, anterior margin nearly straight. Ostium bursae rounded, opening at middle. Antrum funnel-like, weakly sclerotized. Ductus bursae as long as corpus bursae, gradually widening toward corpus bursae; ductus seminalis arising from posterior 1/3 or 1/4. Corpus bursae oval; signum situated at posterior 1/3 or 1/4, rarely at 1/2, basal plate rhombiform, with a hookshaped process arising anteriorly.

Diagnosis. The forewing pattern of P. grandiunca sp. nov. mostly resembles P. glaucitis in this group, but P. grandiunca sp. nov. can be distinguished by the distal streaks. The lowest distal streak is relatively short and runs parallel with upper streaks, which is longer and obliquely extends to dorsum in P. glaucitis based on the illustration by Clarke (1969). Palumbina grandiunca sp. nov. is also similar to the members of the guerinii -group in forewing pattern, but the guerinii -group has typically two distal streaks, and if three, they are not in parallel. The male genitalia are similar to those of P. glaucitis and P. longipalpis . Palumbina grandiunca sp. nov. can be distinguished from P. glaucitis by the apical bristle of the anellus lobe not exceeding the uncus while that of P. glaucitis does; from P. longipalpis by the valva uniformly long while it is constricted at distal 1/ 4 in P. longipalpis .

Distribution. China (Hainan, Hong Kong, Guangdong, Guangxi).

Etymology. The species name is derived from the Latin, grandis (large) and uncus (uncus), referring to the large uncus.

Variations. Based on the specimens examined, those from Hong Kong and Guangdong generally have lighter forewing coloration, and those from Hainan have darker forewing coloration. The length of the distal streaks can be different depending on the specimens.

Figures

FIGURES 1, 2. Distribution of Chinese Palumbina spp. 1, the guerinii-group: ●, P.oxyprora (Meyrick), ■, P. magnisigna sp. nov., the grandiunca-group:▲,P.grandiunca sp.nov., ♣,P.melanotrichasp. nov.;2, unplaced spp.: ●,P.operaria(Meyrick), ■, P.sineloba sp. nov., ▲, P.acerosa sp. nov., ♣, P.rugosa sp. nov., ♥, P.pylartis (Meyrick).

FIGURES49̅51.Male coremata of Palumbina spp.49, P.grandiuncasp. nov., slideno.LGE16317;50, P.acuticula sp.nov., slide no. LGE17019; 51, P. macrodelta (Meyrick), slide no. LGE16041. (Scale bars = 0.5 mm).

FIGURES 52-57. Posterior margin of female abdomen. 52, P. guerinii (Stainton), slide no. ZMUC-NK02; 53, P. grandiunca sp. nov., slide no.LGE16044; 54, P.operaria (Meyrick), slide no.LGE16040; 55, P. rugosa sp. nov., slide no. LGE17015; 56, P. atricha sp. nov., slide no. LGE16341; 57, P.nesoclera (Meyrick), slide no.LGE16048.(Scale bars = 0.5 mm).

FIGURES 65-72. Adults of Palumbina spp. 65, P. guerinii (Stainton), ♀, collected from Greece; 66, P. oxyprora (Meyrick), ♀; 67, P.magnisigna sp. nov., ♂, holotype; 68, P.grandiunca sp. nov., ♂, holotype; 69, P.melanotricha sp. nov., ♂, holotype; 70, P.macrodelta (Meyrick), collected from Hainan, ♀; 71, P.macrodelta (Meyrick), collected from Yunnan, ♀; 72, P. atricha sp. nov., ♂, holotype.(Scale bars = 2.0 mm).

FIGURES 88-93. Male genitalia of Palumbina spp. 88, P. guerinii (Stainton), slide no. ZMUC-NK01; 89, P. oxyprora (Meyrick),slide no.LGE16196; 90, P.magnisigna sp. nov., slide no.LGE16379, paratype; 91, P.grandiuncasp.nov., slideno. LGE16043, holotype, a. lateral view of aedeagus, slide no. LGE16317, paratype; 92, P. melanotricha sp. nov., slide no. LGE16060, holotype; 93, P. macrodelta(Meyrick), slide no.LGE16088,collected from Hainan.(Scale bars = 0.2 mm).

FIGURES 110-113. Female genitalia of Palumbina spp. 110, P. magnisigna sp. nov., slide no. LGE16378, paratype; 111, P. grandiunca sp. nov., slide no. LGE16044, paratype; 112, P. macrodelta (Meyrick), slide no. LGE16042, collected from Hainan; 113, P.macrodelta (Meyrick), slide no. LGE16188, collected from Yunnan.(Scale bars = 0.4 mm).